mirror of
https://github.com/libretro/scummvm.git
synced 2024-12-13 12:39:56 +00:00
ab9598e2f5
svn-id: r13815
1143 lines
30 KiB
C++
1143 lines
30 KiB
C++
/* ScummVM - Scumm Interpreter
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* Copyright (C) 1999-2000 Tatsuyuki Satoh
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* Copyright (C) 2001-2004 The ScummVM project
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* $Header$
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*
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* LGPL licensed version of MAMEs fmopl (V0.37a modified) by
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* Tatsuyuki Satoh. Included from LGPL'ed AdPlug.
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*/
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#include "stdafx.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#include <math.h>
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#include "fmopl.h"
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#include "common/util.h"
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#ifdef _WIN32_WCE
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#include "common/config-manager.h"
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#endif
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/* -------------------- preliminary define section --------------------- */
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/* attack/decay rate time rate */
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#define OPL_ARRATE 141280 /* RATE 4 = 2826.24ms @ 3.6MHz */
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#define OPL_DRRATE 1956000 /* RATE 4 = 39280.64ms @ 3.6MHz */
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#define FREQ_BITS 24 /* frequency turn */
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/* counter bits = 20 , octerve 7 */
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#define FREQ_RATE (1<<(FREQ_BITS-20))
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#define TL_BITS (FREQ_BITS+2)
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/* final output shift , limit minimum and maximum */
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#define OPL_OUTSB (TL_BITS+3-16) /* OPL output final shift 16bit */
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#define OPL_MAXOUT (0x7fff<<OPL_OUTSB)
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#define OPL_MINOUT (-0x8000<<OPL_OUTSB)
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/* -------------------- quality selection --------------------- */
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/* sinwave entries */
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/* used static memory = SIN_ENT * 4 (byte) */
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#define SIN_ENT 2048
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/* output level entries (envelope,sinwave) */
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/* envelope counter lower bits */
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int ENV_BITS;
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/* envelope output entries */
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int EG_ENT;
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/* used dynamic memory = EG_ENT*4*4(byte)or EG_ENT*6*4(byte) */
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/* used static memory = EG_ENT*4 (byte) */
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int EG_OFF; /* OFF */
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int EG_DED;
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int EG_DST; /* DECAY START */
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int EG_AED;
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#define EG_AST 0 /* ATTACK START */
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#define EG_STEP (96.0/EG_ENT) /* OPL is 0.1875 dB step */
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/* LFO table entries */
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#define VIB_ENT 512
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#define VIB_SHIFT (32-9)
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#define AMS_ENT 512
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#define AMS_SHIFT (32-9)
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#define VIB_RATE 256
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/* -------------------- local defines , macros --------------------- */
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/* register number to channel number , slot offset */
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#define SLOT1 0
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#define SLOT2 1
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/* envelope phase */
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#define ENV_MOD_RR 0x00
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#define ENV_MOD_DR 0x01
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#define ENV_MOD_AR 0x02
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/* -------------------- tables --------------------- */
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static const int slot_array[32]=
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{
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0, 2, 4, 1, 3, 5,-1,-1,
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6, 8,10, 7, 9,11,-1,-1,
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12,14,16,13,15,17,-1,-1,
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-1,-1,-1,-1,-1,-1,-1,-1
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};
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static uint KSL_TABLE[8 * 16];
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static const double KSL_TABLE_SEED[8 * 16] = {
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/* OCT 0 */
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0.000, 0.000, 0.000, 0.000,
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0.000, 0.000, 0.000, 0.000,
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0.000, 0.000, 0.000, 0.000,
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0.000, 0.000, 0.000, 0.000,
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/* OCT 1 */
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0.000, 0.000, 0.000, 0.000,
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0.000, 0.000, 0.000, 0.000,
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0.000, 0.750, 1.125, 1.500,
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1.875, 2.250, 2.625, 3.000,
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/* OCT 2 */
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0.000, 0.000, 0.000, 0.000,
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0.000, 1.125, 1.875, 2.625,
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3.000, 3.750, 4.125, 4.500,
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4.875, 5.250, 5.625, 6.000,
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/* OCT 3 */
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0.000, 0.000, 0.000, 1.875,
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3.000, 4.125, 4.875, 5.625,
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6.000, 6.750, 7.125, 7.500,
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7.875, 8.250, 8.625, 9.000,
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/* OCT 4 */
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0.000, 0.000, 3.000, 4.875,
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6.000, 7.125, 7.875, 8.625,
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9.000, 9.750, 10.125, 10.500,
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10.875, 11.250, 11.625, 12.000,
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/* OCT 5 */
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0.000, 3.000, 6.000, 7.875,
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9.000, 10.125, 10.875, 11.625,
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12.000, 12.750, 13.125, 13.500,
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13.875, 14.250, 14.625, 15.000,
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/* OCT 6 */
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0.000, 6.000, 9.000, 10.875,
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12.000, 13.125, 13.875, 14.625,
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15.000, 15.750, 16.125, 16.500,
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16.875, 17.250, 17.625, 18.000,
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/* OCT 7 */
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0.000, 9.000, 12.000, 13.875,
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15.000, 16.125, 16.875, 17.625,
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18.000, 18.750, 19.125, 19.500,
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19.875, 20.250, 20.625, 21.000
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};
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/* sustain lebel table (3db per step) */
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/* 0 - 15: 0, 3, 6, 9,12,15,18,21,24,27,30,33,36,39,42,93 (dB)*/
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static int SL_TABLE[16];
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static const uint SL_TABLE_SEED[16] = {
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 31
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};
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#define TL_MAX (EG_ENT * 2) /* limit(tl + ksr + envelope) + sinwave */
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/* TotalLevel : 48 24 12 6 3 1.5 0.75 (dB) */
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/* TL_TABLE[ 0 to TL_MAX ] : plus section */
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/* TL_TABLE[ TL_MAX to TL_MAX+TL_MAX-1 ] : minus section */
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static int *TL_TABLE;
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/* pointers to TL_TABLE with sinwave output offset */
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static int **SIN_TABLE;
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/* LFO table */
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static int *AMS_TABLE;
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static int *VIB_TABLE;
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/* envelope output curve table */
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/* attack + decay + OFF */
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//static int ENV_CURVE[2*EG_ENT+1];
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static int ENV_CURVE[2 * 4096 + 1]; // to keep it static ...
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/* multiple table */
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#define ML(a) (int)(a * 2)
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static const uint MUL_TABLE[16]= {
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/* 1/2, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15 */
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ML(0.50), ML(1.00), ML(2.00), ML(3.00), ML(4.00), ML(5.00), ML(6.00), ML(7.00),
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ML(8.00), ML(9.00), ML(10.00), ML(10.00),ML(12.00),ML(12.00),ML(15.00),ML(15.00)
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};
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#undef ML
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/* dummy attack / decay rate ( when rate == 0 ) */
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static int RATE_0[16]=
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{0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
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/* -------------------- static state --------------------- */
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/* lock level of common table */
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static int num_lock = 0;
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/* work table */
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static void *cur_chip = NULL; /* current chip point */
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/* currenct chip state */
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/* static OPLSAMPLE *bufL,*bufR; */
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static OPL_CH *S_CH;
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static OPL_CH *E_CH;
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OPL_SLOT *SLOT7_1, *SLOT7_2, *SLOT8_1, *SLOT8_2;
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static int outd[1];
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static int ams;
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static int vib;
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int *ams_table;
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int *vib_table;
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static int amsIncr;
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static int vibIncr;
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static int feedback2; /* connect for SLOT 2 */
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/* --------------------- rebuild tables ------------------- */
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#define SC_KSL(mydb) ((uint) (mydb / (EG_STEP / 2)))
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#define SC_SL(db) (int)(db * ((3 / EG_STEP) * (1 << ENV_BITS))) + EG_DST
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void OPLBuildTables(int ENV_BITS_PARAM, int EG_ENT_PARAM) {
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int i;
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ENV_BITS = ENV_BITS_PARAM;
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EG_ENT = EG_ENT_PARAM;
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EG_OFF = ((2 * EG_ENT)<<ENV_BITS); /* OFF */
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EG_DED = EG_OFF;
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EG_DST = (EG_ENT << ENV_BITS); /* DECAY START */
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EG_AED = EG_DST;
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//EG_STEP = (96.0/EG_ENT);
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for (i = 0; i < (int)(sizeof(KSL_TABLE_SEED) / sizeof(double)); i++)
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KSL_TABLE[i] = SC_KSL(KSL_TABLE_SEED[i]);
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for (i = 0; i < (int)(sizeof(SL_TABLE_SEED) / sizeof(uint)); i++)
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SL_TABLE[i] = SC_SL(SL_TABLE_SEED[i]);
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}
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#undef SC_KSL
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#undef SC_SL
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/* --------------------- subroutines --------------------- */
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inline int Limit(int val, int max, int min) {
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if ( val > max )
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val = max;
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else if ( val < min )
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val = min;
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return val;
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}
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/* status set and IRQ handling */
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inline void OPL_STATUS_SET(FM_OPL *OPL, int flag) {
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/* set status flag */
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OPL->status |= flag;
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if(!(OPL->status & 0x80)) {
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if(OPL->status & OPL->statusmask) { /* IRQ on */
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OPL->status |= 0x80;
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/* callback user interrupt handler (IRQ is OFF to ON) */
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if(OPL->IRQHandler)
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(OPL->IRQHandler)(OPL->IRQParam,1);
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}
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}
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}
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/* status reset and IRQ handling */
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inline void OPL_STATUS_RESET(FM_OPL *OPL, int flag) {
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/* reset status flag */
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OPL->status &= ~flag;
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if((OPL->status & 0x80)) {
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if (!(OPL->status & OPL->statusmask)) {
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OPL->status &= 0x7f;
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/* callback user interrupt handler (IRQ is ON to OFF) */
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if(OPL->IRQHandler) (OPL->IRQHandler)(OPL->IRQParam,0);
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}
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}
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}
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/* IRQ mask set */
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inline void OPL_STATUSMASK_SET(FM_OPL *OPL, int flag) {
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OPL->statusmask = flag;
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/* IRQ handling check */
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OPL_STATUS_SET(OPL,0);
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OPL_STATUS_RESET(OPL,0);
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}
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/* ----- key on ----- */
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inline void OPL_KEYON(OPL_SLOT *SLOT) {
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/* sin wave restart */
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SLOT->Cnt = 0;
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/* set attack */
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SLOT->evm = ENV_MOD_AR;
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SLOT->evs = SLOT->evsa;
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SLOT->evc = EG_AST;
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SLOT->eve = EG_AED;
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}
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/* ----- key off ----- */
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inline void OPL_KEYOFF(OPL_SLOT *SLOT) {
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if( SLOT->evm > ENV_MOD_RR) {
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/* set envelope counter from envleope output */
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SLOT->evm = ENV_MOD_RR;
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if( !(SLOT->evc & EG_DST) )
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//SLOT->evc = (ENV_CURVE[SLOT->evc>>ENV_BITS]<<ENV_BITS) + EG_DST;
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SLOT->evc = EG_DST;
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SLOT->eve = EG_DED;
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SLOT->evs = SLOT->evsr;
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}
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}
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/* ---------- calcrate Envelope Generator & Phase Generator ---------- */
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/* return : envelope output */
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inline uint OPL_CALC_SLOT(OPL_SLOT *SLOT) {
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/* calcrate envelope generator */
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if((SLOT->evc += SLOT->evs) >= SLOT->eve) {
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switch( SLOT->evm ){
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case ENV_MOD_AR: /* ATTACK -> DECAY1 */
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/* next DR */
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SLOT->evm = ENV_MOD_DR;
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SLOT->evc = EG_DST;
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SLOT->eve = SLOT->SL;
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SLOT->evs = SLOT->evsd;
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break;
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case ENV_MOD_DR: /* DECAY -> SL or RR */
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SLOT->evc = SLOT->SL;
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SLOT->eve = EG_DED;
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if(SLOT->eg_typ) {
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SLOT->evs = 0;
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} else {
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SLOT->evm = ENV_MOD_RR;
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SLOT->evs = SLOT->evsr;
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}
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break;
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case ENV_MOD_RR: /* RR -> OFF */
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SLOT->evc = EG_OFF;
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SLOT->eve = EG_OFF + 1;
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SLOT->evs = 0;
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break;
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}
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}
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/* calcrate envelope */
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return SLOT->TLL + ENV_CURVE[SLOT->evc>>ENV_BITS] + (SLOT->ams ? ams : 0);
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}
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/* set algorythm connection */
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static void set_algorythm(OPL_CH *CH) {
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int *carrier = &outd[0];
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CH->connect1 = CH->CON ? carrier : &feedback2;
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CH->connect2 = carrier;
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}
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/* ---------- frequency counter for operater update ---------- */
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inline void CALC_FCSLOT(OPL_CH *CH, OPL_SLOT *SLOT) {
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int ksr;
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/* frequency step counter */
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SLOT->Incr = CH->fc * SLOT->mul;
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ksr = CH->kcode >> SLOT->KSR;
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if( SLOT->ksr != ksr )
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{
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SLOT->ksr = ksr;
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/* attack , decay rate recalcration */
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SLOT->evsa = SLOT->AR[ksr];
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SLOT->evsd = SLOT->DR[ksr];
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SLOT->evsr = SLOT->RR[ksr];
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}
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SLOT->TLL = SLOT->TL + (CH->ksl_base>>SLOT->ksl);
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}
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/* set multi,am,vib,EG-TYP,KSR,mul */
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inline void set_mul(FM_OPL *OPL, int slot, int v) {
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OPL_CH *CH = &OPL->P_CH[slot / 2];
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OPL_SLOT *SLOT = &CH->SLOT[slot & 1];
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SLOT->mul = MUL_TABLE[v & 0x0f];
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SLOT->KSR = (v & 0x10) ? 0 : 2;
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SLOT->eg_typ = (v & 0x20) >> 5;
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SLOT->vib = (v & 0x40);
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SLOT->ams = (v & 0x80);
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CALC_FCSLOT(CH, SLOT);
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}
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/* set ksl & tl */
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inline void set_ksl_tl(FM_OPL *OPL, int slot, int v) {
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OPL_CH *CH = &OPL->P_CH[slot / 2];
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OPL_SLOT *SLOT = &CH->SLOT[slot & 1];
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int ksl = v >> 6; /* 0 / 1.5 / 3 / 6 db/OCT */
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SLOT->ksl = ksl ? 3-ksl : 31;
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SLOT->TL = (int)((v & 0x3f) * (0.75 / EG_STEP)); /* 0.75db step */
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if(!(OPL->mode & 0x80)) { /* not CSM latch total level */
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SLOT->TLL = SLOT->TL + (CH->ksl_base >> SLOT->ksl);
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}
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}
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/* set attack rate & decay rate */
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inline void set_ar_dr(FM_OPL *OPL, int slot, int v) {
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OPL_CH *CH = &OPL->P_CH[slot / 2];
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OPL_SLOT *SLOT = &CH->SLOT[slot & 1];
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int ar = v >> 4;
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int dr = v & 0x0f;
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SLOT->AR = ar ? &OPL->AR_TABLE[ar << 2] : RATE_0;
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SLOT->evsa = SLOT->AR[SLOT->ksr];
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if(SLOT->evm == ENV_MOD_AR)
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SLOT->evs = SLOT->evsa;
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SLOT->DR = dr ? &OPL->DR_TABLE[dr<<2] : RATE_0;
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SLOT->evsd = SLOT->DR[SLOT->ksr];
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if(SLOT->evm == ENV_MOD_DR)
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SLOT->evs = SLOT->evsd;
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}
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/* set sustain level & release rate */
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inline void set_sl_rr(FM_OPL *OPL, int slot, int v) {
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OPL_CH *CH = &OPL->P_CH[slot / 2];
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OPL_SLOT *SLOT = &CH->SLOT[slot & 1];
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int sl = v >> 4;
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int rr = v & 0x0f;
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SLOT->SL = SL_TABLE[sl];
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if(SLOT->evm == ENV_MOD_DR)
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SLOT->eve = SLOT->SL;
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SLOT->RR = &OPL->DR_TABLE[rr<<2];
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SLOT->evsr = SLOT->RR[SLOT->ksr];
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if(SLOT->evm == ENV_MOD_RR)
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SLOT->evs = SLOT->evsr;
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}
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/* operator output calcrator */
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#define OP_OUT(slot,env,con) slot->wavetable[((slot->Cnt + con) / (0x1000000 / SIN_ENT)) & (SIN_ENT-1)][env]
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/* ---------- calcrate one of channel ---------- */
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inline void OPL_CALC_CH(OPL_CH *CH) {
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uint env_out;
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OPL_SLOT *SLOT;
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feedback2 = 0;
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/* SLOT 1 */
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SLOT = &CH->SLOT[SLOT1];
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env_out=OPL_CALC_SLOT(SLOT);
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if(env_out < (uint)(EG_ENT - 1)) {
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/* PG */
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if(SLOT->vib)
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SLOT->Cnt += (SLOT->Incr * vib / VIB_RATE);
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else
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SLOT->Cnt += SLOT->Incr;
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/* connectoion */
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if(CH->FB) {
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int feedback1 = (CH->op1_out[0] + CH->op1_out[1]) >> CH->FB;
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CH->op1_out[1] = CH->op1_out[0];
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*CH->connect1 += CH->op1_out[0] = OP_OUT(SLOT, env_out, feedback1);
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}
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else {
|
|
*CH->connect1 += OP_OUT(SLOT, env_out, 0);
|
|
}
|
|
}else {
|
|
CH->op1_out[1] = CH->op1_out[0];
|
|
CH->op1_out[0] = 0;
|
|
}
|
|
/* SLOT 2 */
|
|
SLOT = &CH->SLOT[SLOT2];
|
|
env_out=OPL_CALC_SLOT(SLOT);
|
|
if(env_out < (uint)(EG_ENT - 1)) {
|
|
/* PG */
|
|
if(SLOT->vib)
|
|
SLOT->Cnt += (SLOT->Incr * vib / VIB_RATE);
|
|
else
|
|
SLOT->Cnt += SLOT->Incr;
|
|
/* connectoion */
|
|
outd[0] += OP_OUT(SLOT, env_out, feedback2);
|
|
}
|
|
}
|
|
|
|
/* ---------- calcrate rythm block ---------- */
|
|
#define WHITE_NOISE_db 6.0
|
|
inline void OPL_CALC_RH(OPL_CH *CH) {
|
|
uint env_tam, env_sd, env_top, env_hh;
|
|
int whitenoise = int(oplRnd.getRandomNumber(1) * (WHITE_NOISE_db / EG_STEP));
|
|
|
|
int tone8;
|
|
|
|
OPL_SLOT *SLOT;
|
|
int env_out;
|
|
|
|
/* BD : same as FM serial mode and output level is large */
|
|
feedback2 = 0;
|
|
/* SLOT 1 */
|
|
SLOT = &CH[6].SLOT[SLOT1];
|
|
env_out = OPL_CALC_SLOT(SLOT);
|
|
if(env_out < EG_ENT-1) {
|
|
/* PG */
|
|
if(SLOT->vib)
|
|
SLOT->Cnt += (SLOT->Incr * vib / VIB_RATE);
|
|
else
|
|
SLOT->Cnt += SLOT->Incr;
|
|
/* connectoion */
|
|
if(CH[6].FB) {
|
|
int feedback1 = (CH[6].op1_out[0] + CH[6].op1_out[1]) >> CH[6].FB;
|
|
CH[6].op1_out[1] = CH[6].op1_out[0];
|
|
feedback2 = CH[6].op1_out[0] = OP_OUT(SLOT, env_out, feedback1);
|
|
}
|
|
else {
|
|
feedback2 = OP_OUT(SLOT, env_out, 0);
|
|
}
|
|
}else {
|
|
feedback2 = 0;
|
|
CH[6].op1_out[1] = CH[6].op1_out[0];
|
|
CH[6].op1_out[0] = 0;
|
|
}
|
|
/* SLOT 2 */
|
|
SLOT = &CH[6].SLOT[SLOT2];
|
|
env_out = OPL_CALC_SLOT(SLOT);
|
|
if(env_out < EG_ENT-1) {
|
|
/* PG */
|
|
if(SLOT->vib)
|
|
SLOT->Cnt += (SLOT->Incr * vib / VIB_RATE);
|
|
else
|
|
SLOT->Cnt += SLOT->Incr;
|
|
/* connectoion */
|
|
outd[0] += OP_OUT(SLOT, env_out, feedback2) * 2;
|
|
}
|
|
|
|
// SD (17) = mul14[fnum7] + white noise
|
|
// TAM (15) = mul15[fnum8]
|
|
// TOP (18) = fnum6(mul18[fnum8]+whitenoise)
|
|
// HH (14) = fnum7(mul18[fnum8]+whitenoise) + white noise
|
|
env_sd = OPL_CALC_SLOT(SLOT7_2) + whitenoise;
|
|
env_tam =OPL_CALC_SLOT(SLOT8_1);
|
|
env_top = OPL_CALC_SLOT(SLOT8_2);
|
|
env_hh = OPL_CALC_SLOT(SLOT7_1) + whitenoise;
|
|
|
|
/* PG */
|
|
if(SLOT7_1->vib)
|
|
SLOT7_1->Cnt += (2 * SLOT7_1->Incr * vib / VIB_RATE);
|
|
else
|
|
SLOT7_1->Cnt += 2 * SLOT7_1->Incr;
|
|
if(SLOT7_2->vib)
|
|
SLOT7_2->Cnt += ((CH[7].fc * 8) * vib / VIB_RATE);
|
|
else
|
|
SLOT7_2->Cnt += (CH[7].fc * 8);
|
|
if(SLOT8_1->vib)
|
|
SLOT8_1->Cnt += (SLOT8_1->Incr * vib / VIB_RATE);
|
|
else
|
|
SLOT8_1->Cnt += SLOT8_1->Incr;
|
|
if(SLOT8_2->vib)
|
|
SLOT8_2->Cnt += ((CH[8].fc * 48) * vib / VIB_RATE);
|
|
else
|
|
SLOT8_2->Cnt += (CH[8].fc * 48);
|
|
|
|
tone8 = OP_OUT(SLOT8_2,whitenoise,0 );
|
|
|
|
/* SD */
|
|
if(env_sd < (uint)(EG_ENT - 1))
|
|
outd[0] += OP_OUT(SLOT7_1, env_sd, 0) * 8;
|
|
/* TAM */
|
|
if(env_tam < (uint)(EG_ENT - 1))
|
|
outd[0] += OP_OUT(SLOT8_1, env_tam, 0) * 2;
|
|
/* TOP-CY */
|
|
if(env_top < (uint)(EG_ENT - 1))
|
|
outd[0] += OP_OUT(SLOT7_2, env_top, tone8) * 2;
|
|
/* HH */
|
|
if(env_hh < (uint)(EG_ENT-1))
|
|
outd[0] += OP_OUT(SLOT7_2, env_hh, tone8) * 2;
|
|
}
|
|
|
|
/* ----------- initialize time tabls ----------- */
|
|
static void init_timetables(FM_OPL *OPL, int ARRATE, int DRRATE) {
|
|
int i;
|
|
double rate;
|
|
|
|
/* make attack rate & decay rate tables */
|
|
for (i = 0; i < 4; i++)
|
|
OPL->AR_TABLE[i] = OPL->DR_TABLE[i] = 0;
|
|
for (i = 4; i <= 60; i++){
|
|
rate = OPL->freqbase; /* frequency rate */
|
|
if(i < 60)
|
|
rate *= 1.0 + (i & 3) * 0.25; /* b0-1 : x1 , x1.25 , x1.5 , x1.75 */
|
|
rate *= 1 << ((i >> 2) - 1); /* b2-5 : shift bit */
|
|
rate *= (double)(EG_ENT << ENV_BITS);
|
|
OPL->AR_TABLE[i] = (int)(rate / ARRATE);
|
|
OPL->DR_TABLE[i] = (int)(rate / DRRATE);
|
|
}
|
|
for (i = 60; i < 75; i++) {
|
|
OPL->AR_TABLE[i] = EG_AED-1;
|
|
OPL->DR_TABLE[i] = OPL->DR_TABLE[60];
|
|
}
|
|
}
|
|
|
|
/* ---------- generic table initialize ---------- */
|
|
static int OPLOpenTable(void) {
|
|
int s,t;
|
|
double rate;
|
|
int i,j;
|
|
double pom;
|
|
|
|
/* allocate dynamic tables */
|
|
if((TL_TABLE = (int *)malloc(TL_MAX * 2 * sizeof(int))) == NULL)
|
|
return 0;
|
|
if((SIN_TABLE = (int **)malloc(SIN_ENT * 4 * sizeof(int *))) == NULL) {
|
|
free(TL_TABLE);
|
|
return 0;
|
|
}
|
|
if((AMS_TABLE = (int *)malloc(AMS_ENT * 2 * sizeof(int))) == NULL) {
|
|
free(TL_TABLE);
|
|
free(SIN_TABLE);
|
|
return 0;
|
|
}
|
|
if((VIB_TABLE = (int *)malloc(VIB_ENT * 2 * sizeof(int))) == NULL) {
|
|
free(TL_TABLE);
|
|
free(SIN_TABLE);
|
|
free(AMS_TABLE);
|
|
return 0;
|
|
}
|
|
/* make total level table */
|
|
for (t = 0; t < EG_ENT - 1 ; t++){
|
|
rate = ((1 << TL_BITS) - 1) / pow(10.0, EG_STEP * t / 20); /* dB -> voltage */
|
|
TL_TABLE[ t] = (int)rate;
|
|
TL_TABLE[TL_MAX + t] = -TL_TABLE[t];
|
|
}
|
|
/* fill volume off area */
|
|
for (t = EG_ENT - 1; t < TL_MAX; t++){
|
|
TL_TABLE[t] = TL_TABLE[TL_MAX + t] = 0;
|
|
}
|
|
|
|
/* make sinwave table (total level offet) */
|
|
/* degree 0 = degree 180 = off */
|
|
SIN_TABLE[0] = SIN_TABLE[SIN_ENT /2 ] = &TL_TABLE[EG_ENT - 1];
|
|
for (s = 1;s <= SIN_ENT / 4; s++){
|
|
pom = sin(2 * PI * s / SIN_ENT); /* sin */
|
|
pom = 20 * log10(1 / pom); /* decibel */
|
|
j = int(pom / EG_STEP); /* TL_TABLE steps */
|
|
|
|
/* degree 0 - 90 , degree 180 - 90 : plus section */
|
|
SIN_TABLE[ s] = SIN_TABLE[SIN_ENT / 2 - s] = &TL_TABLE[j];
|
|
/* degree 180 - 270 , degree 360 - 270 : minus section */
|
|
SIN_TABLE[SIN_ENT / 2 + s] = SIN_TABLE[SIN_ENT - s] = &TL_TABLE[TL_MAX + j];
|
|
}
|
|
for (s = 0;s < SIN_ENT; s++) {
|
|
SIN_TABLE[SIN_ENT * 1 + s] = s < (SIN_ENT / 2) ? SIN_TABLE[s] : &TL_TABLE[EG_ENT];
|
|
SIN_TABLE[SIN_ENT * 2 + s] = SIN_TABLE[s % (SIN_ENT / 2)];
|
|
SIN_TABLE[SIN_ENT * 3 + s] = (s / (SIN_ENT / 4)) & 1 ? &TL_TABLE[EG_ENT] : SIN_TABLE[SIN_ENT * 2 + s];
|
|
}
|
|
|
|
/* envelope counter -> envelope output table */
|
|
for (i=0; i < EG_ENT; i++) {
|
|
/* ATTACK curve */
|
|
pom = pow(((double)(EG_ENT - 1 - i) / EG_ENT), 8) * EG_ENT;
|
|
/* if( pom >= EG_ENT ) pom = EG_ENT-1; */
|
|
ENV_CURVE[i] = (int)pom;
|
|
/* DECAY ,RELEASE curve */
|
|
ENV_CURVE[(EG_DST >> ENV_BITS) + i]= i;
|
|
}
|
|
/* off */
|
|
ENV_CURVE[EG_OFF >> ENV_BITS]= EG_ENT - 1;
|
|
/* make LFO ams table */
|
|
for (i=0; i < AMS_ENT; i++) {
|
|
pom = (1.0 + sin(2 * PI * i / AMS_ENT)) / 2; /* sin */
|
|
AMS_TABLE[i] = (int)((1.0 / EG_STEP) * pom); /* 1dB */
|
|
AMS_TABLE[AMS_ENT + i] = (int)((4.8 / EG_STEP) * pom); /* 4.8dB */
|
|
}
|
|
/* make LFO vibrate table */
|
|
for (i=0; i < VIB_ENT; i++) {
|
|
/* 100cent = 1seminote = 6% ?? */
|
|
pom = (double)VIB_RATE * 0.06 * sin(2 * PI * i / VIB_ENT); /* +-100sect step */
|
|
VIB_TABLE[i] = (int)(VIB_RATE + (pom * 0.07)); /* +- 7cent */
|
|
VIB_TABLE[VIB_ENT + i] = (int)(VIB_RATE + (pom * 0.14)); /* +-14cent */
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static void OPLCloseTable(void) {
|
|
free(TL_TABLE);
|
|
free(SIN_TABLE);
|
|
free(AMS_TABLE);
|
|
free(VIB_TABLE);
|
|
}
|
|
|
|
/* CSM Key Controll */
|
|
inline void CSMKeyControll(OPL_CH *CH) {
|
|
OPL_SLOT *slot1 = &CH->SLOT[SLOT1];
|
|
OPL_SLOT *slot2 = &CH->SLOT[SLOT2];
|
|
/* all key off */
|
|
OPL_KEYOFF(slot1);
|
|
OPL_KEYOFF(slot2);
|
|
/* total level latch */
|
|
slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl);
|
|
slot1->TLL = slot1->TL + (CH->ksl_base>>slot1->ksl);
|
|
/* key on */
|
|
CH->op1_out[0] = CH->op1_out[1] = 0;
|
|
OPL_KEYON(slot1);
|
|
OPL_KEYON(slot2);
|
|
}
|
|
|
|
/* ---------- opl initialize ---------- */
|
|
static void OPL_initalize(FM_OPL *OPL) {
|
|
int fn;
|
|
|
|
/* frequency base */
|
|
OPL->freqbase = (OPL->rate) ? ((double)OPL->clock / OPL->rate) / 72 : 0;
|
|
/* Timer base time */
|
|
OPL->TimerBase = 1.0/((double)OPL->clock / 72.0 );
|
|
/* make time tables */
|
|
init_timetables(OPL, OPL_ARRATE, OPL_DRRATE);
|
|
/* make fnumber -> increment counter table */
|
|
for( fn=0; fn < 1024; fn++) {
|
|
OPL->FN_TABLE[fn] = (uint)(OPL->freqbase * fn * FREQ_RATE * (1<<7) / 2);
|
|
}
|
|
/* LFO freq.table */
|
|
OPL->amsIncr = (int)(OPL->rate ? (double)AMS_ENT * (1 << AMS_SHIFT) / OPL->rate * 3.7 * ((double)OPL->clock/3600000) : 0);
|
|
OPL->vibIncr = (int)(OPL->rate ? (double)VIB_ENT * (1 << VIB_SHIFT) / OPL->rate * 6.4 * ((double)OPL->clock/3600000) : 0);
|
|
}
|
|
|
|
/* ---------- write a OPL registers ---------- */
|
|
void OPLWriteReg(FM_OPL *OPL, int r, int v) {
|
|
OPL_CH *CH;
|
|
int slot;
|
|
uint block_fnum;
|
|
|
|
switch(r & 0xe0) {
|
|
case 0x00: /* 00-1f:controll */
|
|
switch(r & 0x1f) {
|
|
case 0x01:
|
|
/* wave selector enable */
|
|
if(OPL->type&OPL_TYPE_WAVESEL) {
|
|
OPL->wavesel = v & 0x20;
|
|
if(!OPL->wavesel) {
|
|
/* preset compatible mode */
|
|
int c;
|
|
for(c=0; c<OPL->max_ch; c++) {
|
|
OPL->P_CH[c].SLOT[SLOT1].wavetable = &SIN_TABLE[0];
|
|
OPL->P_CH[c].SLOT[SLOT2].wavetable = &SIN_TABLE[0];
|
|
}
|
|
}
|
|
}
|
|
return;
|
|
case 0x02: /* Timer 1 */
|
|
OPL->T[0] = (256-v) * 4;
|
|
break;
|
|
case 0x03: /* Timer 2 */
|
|
OPL->T[1] = (256-v) * 16;
|
|
return;
|
|
case 0x04: /* IRQ clear / mask and Timer enable */
|
|
if(v & 0x80) { /* IRQ flag clear */
|
|
OPL_STATUS_RESET(OPL, 0x7f);
|
|
}
|
|
else { /* set IRQ mask ,timer enable*/
|
|
uint8 st1 = v & 1;
|
|
uint8 st2 = (v >> 1) & 1;
|
|
/* IRQRST,T1MSK,t2MSK,EOSMSK,BRMSK,x,ST2,ST1 */
|
|
OPL_STATUS_RESET(OPL, v & 0x78);
|
|
OPL_STATUSMASK_SET(OPL,((~v) & 0x78) | 0x01);
|
|
/* timer 2 */
|
|
if(OPL->st[1] != st2) {
|
|
double interval = st2 ? (double)OPL->T[1] * OPL->TimerBase : 0.0;
|
|
OPL->st[1] = st2;
|
|
if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam + 1, interval);
|
|
}
|
|
/* timer 1 */
|
|
if(OPL->st[0] != st1) {
|
|
double interval = st1 ? (double)OPL->T[0] * OPL->TimerBase : 0.0;
|
|
OPL->st[0] = st1;
|
|
if (OPL->TimerHandler) (OPL->TimerHandler)(OPL->TimerParam + 0, interval);
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
break;
|
|
case 0x20: /* am,vib,ksr,eg type,mul */
|
|
slot = slot_array[r&0x1f];
|
|
if(slot == -1)
|
|
return;
|
|
set_mul(OPL,slot,v);
|
|
return;
|
|
case 0x40:
|
|
slot = slot_array[r&0x1f];
|
|
if(slot == -1)
|
|
return;
|
|
set_ksl_tl(OPL,slot,v);
|
|
return;
|
|
case 0x60:
|
|
slot = slot_array[r&0x1f];
|
|
if(slot == -1)
|
|
return;
|
|
set_ar_dr(OPL,slot,v);
|
|
return;
|
|
case 0x80:
|
|
slot = slot_array[r&0x1f];
|
|
if(slot == -1)
|
|
return;
|
|
set_sl_rr(OPL,slot,v);
|
|
return;
|
|
case 0xa0:
|
|
switch(r) {
|
|
case 0xbd:
|
|
/* amsep,vibdep,r,bd,sd,tom,tc,hh */
|
|
{
|
|
uint8 rkey = OPL->rythm ^ v;
|
|
OPL->ams_table = &AMS_TABLE[v & 0x80 ? AMS_ENT : 0];
|
|
OPL->vib_table = &VIB_TABLE[v & 0x40 ? VIB_ENT : 0];
|
|
OPL->rythm = v & 0x3f;
|
|
if(OPL->rythm & 0x20) {
|
|
/* BD key on/off */
|
|
if(rkey & 0x10) {
|
|
if(v & 0x10) {
|
|
OPL->P_CH[6].op1_out[0] = OPL->P_CH[6].op1_out[1] = 0;
|
|
OPL_KEYON(&OPL->P_CH[6].SLOT[SLOT1]);
|
|
OPL_KEYON(&OPL->P_CH[6].SLOT[SLOT2]);
|
|
}
|
|
else {
|
|
OPL_KEYOFF(&OPL->P_CH[6].SLOT[SLOT1]);
|
|
OPL_KEYOFF(&OPL->P_CH[6].SLOT[SLOT2]);
|
|
}
|
|
}
|
|
/* SD key on/off */
|
|
if(rkey & 0x08) {
|
|
if(v & 0x08)
|
|
OPL_KEYON(&OPL->P_CH[7].SLOT[SLOT2]);
|
|
else
|
|
OPL_KEYOFF(&OPL->P_CH[7].SLOT[SLOT2]);
|
|
}/* TAM key on/off */
|
|
if(rkey & 0x04) {
|
|
if(v & 0x04)
|
|
OPL_KEYON(&OPL->P_CH[8].SLOT[SLOT1]);
|
|
else
|
|
OPL_KEYOFF(&OPL->P_CH[8].SLOT[SLOT1]);
|
|
}
|
|
/* TOP-CY key on/off */
|
|
if(rkey & 0x02) {
|
|
if(v & 0x02)
|
|
OPL_KEYON(&OPL->P_CH[8].SLOT[SLOT2]);
|
|
else
|
|
OPL_KEYOFF(&OPL->P_CH[8].SLOT[SLOT2]);
|
|
}
|
|
/* HH key on/off */
|
|
if(rkey & 0x01) {
|
|
if(v & 0x01)
|
|
OPL_KEYON(&OPL->P_CH[7].SLOT[SLOT1]);
|
|
else
|
|
OPL_KEYOFF(&OPL->P_CH[7].SLOT[SLOT1]);
|
|
}
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
/* keyon,block,fnum */
|
|
if((r & 0x0f) > 8)
|
|
return;
|
|
CH = &OPL->P_CH[r & 0x0f];
|
|
if(!(r&0x10)) { /* a0-a8 */
|
|
block_fnum = (CH->block_fnum & 0x1f00) | v;
|
|
}
|
|
else { /* b0-b8 */
|
|
int keyon = (v >> 5) & 1;
|
|
block_fnum = ((v & 0x1f) << 8) | (CH->block_fnum & 0xff);
|
|
if(CH->keyon != keyon) {
|
|
if((CH->keyon=keyon)) {
|
|
CH->op1_out[0] = CH->op1_out[1] = 0;
|
|
OPL_KEYON(&CH->SLOT[SLOT1]);
|
|
OPL_KEYON(&CH->SLOT[SLOT2]);
|
|
}
|
|
else {
|
|
OPL_KEYOFF(&CH->SLOT[SLOT1]);
|
|
OPL_KEYOFF(&CH->SLOT[SLOT2]);
|
|
}
|
|
}
|
|
}
|
|
/* update */
|
|
if(CH->block_fnum != block_fnum) {
|
|
int blockRv = 7 - (block_fnum >> 10);
|
|
int fnum = block_fnum & 0x3ff;
|
|
CH->block_fnum = block_fnum;
|
|
CH->ksl_base = KSL_TABLE[block_fnum >> 6];
|
|
CH->fc = OPL->FN_TABLE[fnum] >> blockRv;
|
|
CH->kcode = CH->block_fnum >> 9;
|
|
if((OPL->mode & 0x40) && CH->block_fnum & 0x100)
|
|
CH->kcode |=1;
|
|
CALC_FCSLOT(CH,&CH->SLOT[SLOT1]);
|
|
CALC_FCSLOT(CH,&CH->SLOT[SLOT2]);
|
|
}
|
|
return;
|
|
case 0xc0:
|
|
/* FB,C */
|
|
if((r & 0x0f) > 8)
|
|
return;
|
|
CH = &OPL->P_CH[r&0x0f];
|
|
{
|
|
int feedback = (v >> 1) & 7;
|
|
CH->FB = feedback ? (8 + 1) - feedback : 0;
|
|
CH->CON = v & 1;
|
|
set_algorythm(CH);
|
|
}
|
|
return;
|
|
case 0xe0: /* wave type */
|
|
slot = slot_array[r & 0x1f];
|
|
if(slot == -1)
|
|
return;
|
|
CH = &OPL->P_CH[slot / 2];
|
|
if(OPL->wavesel) {
|
|
CH->SLOT[slot&1].wavetable = &SIN_TABLE[(v & 0x03) * SIN_ENT];
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* lock/unlock for common table */
|
|
static int OPL_LockTable(void)
|
|
{
|
|
num_lock++;
|
|
if(num_lock>1)
|
|
return 0;
|
|
/* first time */
|
|
cur_chip = NULL;
|
|
/* allocate total level table (128kb space) */
|
|
if(!OPLOpenTable()) {
|
|
num_lock--;
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void OPL_UnLockTable(void) {
|
|
if(num_lock)
|
|
num_lock--;
|
|
if(num_lock)
|
|
return;
|
|
/* last time */
|
|
cur_chip = NULL;
|
|
OPLCloseTable();
|
|
}
|
|
|
|
/*******************************************************************************/
|
|
/* YM3812 local section */
|
|
/*******************************************************************************/
|
|
|
|
/* ---------- update one of chip ----------- */
|
|
void YM3812UpdateOne(FM_OPL *OPL, int16 *buffer, int length) {
|
|
int i;
|
|
int data;
|
|
int16 *buf = buffer;
|
|
uint amsCnt = OPL->amsCnt;
|
|
uint vibCnt = OPL->vibCnt;
|
|
uint8 rythm = OPL->rythm & 0x20;
|
|
OPL_CH *CH, *R_CH;
|
|
|
|
if((void *)OPL != cur_chip){
|
|
cur_chip = (void *)OPL;
|
|
/* channel pointers */
|
|
S_CH = OPL->P_CH;
|
|
E_CH = &S_CH[9];
|
|
/* rythm slot */
|
|
SLOT7_1 = &S_CH[7].SLOT[SLOT1];
|
|
SLOT7_2 = &S_CH[7].SLOT[SLOT2];
|
|
SLOT8_1 = &S_CH[8].SLOT[SLOT1];
|
|
SLOT8_2 = &S_CH[8].SLOT[SLOT2];
|
|
/* LFO state */
|
|
amsIncr = OPL->amsIncr;
|
|
vibIncr = OPL->vibIncr;
|
|
ams_table = OPL->ams_table;
|
|
vib_table = OPL->vib_table;
|
|
}
|
|
R_CH = rythm ? &S_CH[6] : E_CH;
|
|
for(i = 0; i < length; i++) {
|
|
/* channel A channel B channel C */
|
|
/* LFO */
|
|
ams = ams_table[(amsCnt += amsIncr) >> AMS_SHIFT];
|
|
vib = vib_table[(vibCnt += vibIncr) >> VIB_SHIFT];
|
|
outd[0] = 0;
|
|
/* FM part */
|
|
for(CH=S_CH; CH < R_CH; CH++)
|
|
OPL_CALC_CH(CH);
|
|
/* Rythn part */
|
|
if(rythm)
|
|
OPL_CALC_RH(S_CH);
|
|
/* limit check */
|
|
data = Limit(outd[0], OPL_MAXOUT, OPL_MINOUT);
|
|
/* store to sound buffer */
|
|
buf[i] = data >> OPL_OUTSB;
|
|
}
|
|
|
|
OPL->amsCnt = amsCnt;
|
|
OPL->vibCnt = vibCnt;
|
|
}
|
|
|
|
/* ---------- reset a chip ---------- */
|
|
void OPLResetChip(FM_OPL *OPL) {
|
|
int c,s;
|
|
int i;
|
|
|
|
/* reset chip */
|
|
OPL->mode = 0; /* normal mode */
|
|
OPL_STATUS_RESET(OPL, 0x7f);
|
|
/* reset with register write */
|
|
OPLWriteReg(OPL, 0x01,0); /* wabesel disable */
|
|
OPLWriteReg(OPL, 0x02,0); /* Timer1 */
|
|
OPLWriteReg(OPL, 0x03,0); /* Timer2 */
|
|
OPLWriteReg(OPL, 0x04,0); /* IRQ mask clear */
|
|
for(i = 0xff; i >= 0x20; i--)
|
|
OPLWriteReg(OPL,i,0);
|
|
/* reset OPerator parameter */
|
|
for(c = 0; c < OPL->max_ch ;c++ ) {
|
|
OPL_CH *CH = &OPL->P_CH[c];
|
|
/* OPL->P_CH[c].PAN = OPN_CENTER; */
|
|
for(s = 0; s < 2; s++ ) {
|
|
/* wave table */
|
|
CH->SLOT[s].wavetable = &SIN_TABLE[0];
|
|
/* CH->SLOT[s].evm = ENV_MOD_RR; */
|
|
CH->SLOT[s].evc = EG_OFF;
|
|
CH->SLOT[s].eve = EG_OFF + 1;
|
|
CH->SLOT[s].evs = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* ---------- Create a virtual YM3812 ---------- */
|
|
/* 'rate' is sampling rate and 'bufsiz' is the size of the */
|
|
FM_OPL *OPLCreate(int type, int clock, int rate) {
|
|
char *ptr;
|
|
FM_OPL *OPL;
|
|
int state_size;
|
|
int max_ch = 9; /* normaly 9 channels */
|
|
|
|
if( OPL_LockTable() == -1)
|
|
return NULL;
|
|
/* allocate OPL state space */
|
|
state_size = sizeof(FM_OPL);
|
|
state_size += sizeof(OPL_CH) * max_ch;
|
|
|
|
/* allocate memory block */
|
|
ptr = (char *)calloc(state_size, 1);
|
|
if(ptr == NULL)
|
|
return NULL;
|
|
|
|
/* clear */
|
|
memset(ptr, 0, state_size);
|
|
OPL = (FM_OPL *)ptr; ptr += sizeof(FM_OPL);
|
|
OPL->P_CH = (OPL_CH *)ptr; ptr += sizeof(OPL_CH) * max_ch;
|
|
|
|
/* set channel state pointer */
|
|
OPL->type = type;
|
|
OPL->clock = clock;
|
|
OPL->rate = rate;
|
|
OPL->max_ch = max_ch;
|
|
|
|
/* init grobal tables */
|
|
OPL_initalize(OPL);
|
|
|
|
/* reset chip */
|
|
OPLResetChip(OPL);
|
|
return OPL;
|
|
}
|
|
|
|
/* ---------- Destroy one of vietual YM3812 ---------- */
|
|
void OPLDestroy(FM_OPL *OPL) {
|
|
OPL_UnLockTable();
|
|
free(OPL);
|
|
}
|
|
|
|
/* ---------- Option handlers ---------- */
|
|
|
|
void OPLSetTimerHandler(FM_OPL *OPL, OPL_TIMERHANDLER TimerHandler,int channelOffset) {
|
|
OPL->TimerHandler = TimerHandler;
|
|
OPL->TimerParam = channelOffset;
|
|
}
|
|
|
|
void OPLSetIRQHandler(FM_OPL *OPL, OPL_IRQHANDLER IRQHandler, int param) {
|
|
OPL->IRQHandler = IRQHandler;
|
|
OPL->IRQParam = param;
|
|
}
|
|
void OPLSetUpdateHandler(FM_OPL *OPL, OPL_UPDATEHANDLER UpdateHandler,int param) {
|
|
OPL->UpdateHandler = UpdateHandler;
|
|
OPL->UpdateParam = param;
|
|
}
|
|
|
|
/* ---------- YM3812 I/O interface ---------- */
|
|
int OPLWrite(FM_OPL *OPL,int a,int v) {
|
|
if(!(a & 1)) { /* address port */
|
|
OPL->address = v & 0xff;
|
|
}
|
|
else { /* data port */
|
|
if(OPL->UpdateHandler)
|
|
OPL->UpdateHandler(OPL->UpdateParam,0);
|
|
OPLWriteReg(OPL, OPL->address,v);
|
|
}
|
|
return OPL->status >> 7;
|
|
}
|
|
|
|
unsigned char OPLRead(FM_OPL *OPL,int a) {
|
|
if(!(a & 1)) { /* status port */
|
|
return OPL->status & (OPL->statusmask | 0x80);
|
|
}
|
|
/* data port */
|
|
switch(OPL->address) {
|
|
case 0x05: /* KeyBoard IN */
|
|
warning("OPL:read unmapped KEYBOARD port\n");
|
|
return 0;
|
|
case 0x19: /* I/O DATA */
|
|
warning("OPL:read unmapped I/O port\n");
|
|
return 0;
|
|
case 0x1a: /* PCM-DATA */
|
|
return 0;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int OPLTimerOver(FM_OPL *OPL, int c) {
|
|
if(c) { /* Timer B */
|
|
OPL_STATUS_SET(OPL, 0x20);
|
|
}
|
|
else { /* Timer A */
|
|
OPL_STATUS_SET(OPL, 0x40);
|
|
/* CSM mode key,TL controll */
|
|
if(OPL->mode & 0x80) { /* CSM mode total level latch and auto key on */
|
|
int ch;
|
|
if(OPL->UpdateHandler)
|
|
OPL->UpdateHandler(OPL->UpdateParam,0);
|
|
for(ch = 0; ch < 9; ch++)
|
|
CSMKeyControll(&OPL->P_CH[ch]);
|
|
}
|
|
}
|
|
/* reload timer */
|
|
if (OPL->TimerHandler)
|
|
(OPL->TimerHandler)(OPL->TimerParam + c, (double)OPL->T[c] * OPL->TimerBase);
|
|
return OPL->status >> 7;
|
|
}
|
|
|
|
FM_OPL *makeAdlibOPL(int rate) {
|
|
// We need to emulate one YM3812 chip
|
|
int env_bits = FMOPL_ENV_BITS_HQ;
|
|
int eg_ent = FMOPL_EG_ENT_HQ;
|
|
#ifdef _WIN32_WCE
|
|
if (ConfMan.hasKey("FM_high_quality") && ConfMan.getBool("FM_high_quality")) {
|
|
env_bits = FMOPL_ENV_BITS_HQ;
|
|
eg_ent = FMOPL_EG_ENT_HQ;
|
|
}
|
|
else {
|
|
env_bits = FMOPL_ENV_BITS_LQ;
|
|
eg_ent = FMOPL_EG_ENT_LQ;
|
|
}
|
|
#endif
|
|
OPLBuildTables(env_bits, eg_ent);
|
|
return OPLCreate(OPL_TYPE_YM3812, 3579545, rate);
|
|
}
|